The huge hydrogen cloud that surrounds the nucleus of a comet has a typical diameter of about:
A)1/2 au.
B)2 au.
C)1 million km.
D)10 million km.

Name: The huge hydrogen cloud that surrounds the nucleus of a comet has a typical diameter of about: A)1/2 au. B)2 au. C)1 million km. D)10 million km.
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Question

Quizplus · Accepted Answer

The huge hydrogen cloud that surrounds the nucleus of a comet is called the coma. Its typical diameter is about 1 million km. Therefore, the correct choice is C.

The Huge Hydrogen Cloud That Surrounds the Nucleus of a Comet